Thirteen years after their sudden disappearance, an alien race known as the Heterodyne resurface without warning. To combat the Heterodyne, three office workers from the 21st Century Security Corporation operate Dai-Guard - a giant robot no longer regarded as an oversized paperweight. Unfortunately, Dai-Guard is somewhat obsolete and in disrepair. It's a tough job, but salarymen can also save the world. (Source: ANN)
GoGoAnime is the best site to watch Chikyuu Bouei Kigyou Dai-Guard
SUB online, or you can even watch Chikyuu Bouei Kigyou Dai-Guard
DUB in HD quality. You can also find Xebec
anime on GoGoAnime website.